A former Softie friend of mine IM'ed me about this job. Sure, you need C++ skills, but there's more to it than that. They need a variety of skills because you'll get to do a variety of work... off the top of his head he listed:

multiplayer game infrastructure

chat and presence application

drm / installer

IE toolbar

flash applets

a bunch of other stuff

There's a Craiglist ad, which includes application instructions. This is in Seattle, by the way.